SharePoint returned the following error: The operation failed because the server could not access the distributed cache. Internal type name: Microsoft.Office.Server.Microfeed.MicrofeedException. Internal error code: 55. Contact your system administrator for help in resolving this problem.

First go to the Centra Administration -> Userprofile service via browser and check the permissions. Then Open the IIS manager and go to the App pools. Identify the App pool account which is running the service applications. Try re- enter credentials to verify that the account is not expired. If not compare the UPS permission list contains the app pool admin account or not. If not do 2nd step. or else try rebuild Distributed Cache and give permission again. (step 1 and 2 ).